前提
入行已经7,8年了，一直想做一套漂亮点的自定义控件，于是就有了本系列文章。
github：https://github.com/kwwwvagaa/netwinformcontrol
码云：
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nuget
install-package hzh_controls
目录
用处及效果
1 hzh_controls.forms.frmanchortips.showtips(button1, "测试提示信息\nleft", anchortipslocation.left); 2 hzh_controls.forms.frmanchortips.showtips(button1, "测试提示信息\nright", anchortipslocation.right); 3 hzh_controls.forms.frmanchortips.showtips(button1, "测试提示信息\ntop", anchortipslocation.top); 4 hzh_controls.forms.frmanchortips.showtips(button1, "测试提示信息\nbottom", anchortipslocation.bottom);
准备工作
依然是gdi+画图，不懂可以自行百度一下
开始
思路是：根据参数画图，根据图显示不规则窗体
添加一个窗体frmanchortips
重写一些函数
1 #region override
2
3 protected override void onclosing(canceleventargs e)
4 {
5 e.cancel = true;
6 base.onclosing(e);
7 havehandle = false;
8 this.dispose();
9 }
10
11 protected override void onhandlecreated(eventargs e)
12 {
13 initializestyles();
14 base.onhandlecreated(e);
15 havehandle = true;
16 }
17
18 protected override createparams createparams
19 {
20 get
21 {
22 createparams cparms = base.createparams;
23 cparms.exstyle |= 0x00080000; // ws_ex_layered
24 return cparms;
25 }
26 }
27
28 #endregion
1 private void initializestyles()
2 {
3 setstyle(controlstyles.allpaintinginwmpaint, true);
4 setstyle(controlstyles.userpaint, true);
5 updatestyles();
6 }
根据图片显示窗体，这个是网上copy的
1 #region 根据图片显示窗体 english:display forms based on pictures
2 /// <summary>
3 /// 功能描述:根据图片显示窗体 english:display forms based on pictures
4 /// 作 者:hzh
5 /// 创建日期:2019-08-29 15:31:16
6 /// 任务编号:
7 /// </summary>
8 /// <param name="bitmap">bitmap</param>
9 private void setbits(bitmap bitmap)
10 {
11 if (!havehandle) return;
12
13 if (!bitmap.iscanonicalpixelformat(bitmap.pixelformat) || !bitmap.isalphapixelformat(bitmap.pixelformat))
14 throw new applicationexception("the picture must be 32bit picture with alpha channel.");
15
16 intptr oldbits = intptr.zero;
17 intptr screendc = win32.getdc(intptr.zero);
18 intptr hbitmap = intptr.zero;
19 intptr memdc = win32.createcompatibledc(screendc);
20
21 try
22 {
23 win32.point toploc = new win32.point(left, top);
24 win32.size bitmapsize = new win32.size(bitmap.width, bitmap.height);
25 win32.blendfunction blendfunc = new win32.blendfunction();
26 win32.point srcloc = new win32.point(0, 0);
27
28 hbitmap = bitmap.gethbitmap(color.fromargb(0));
29 oldbits = win32.selectobject(memdc, hbitmap);
30
31 blendfunc.blendop = win32.ac_src_over;
32 blendfunc.sourceconstantalpha = 255;
33 blendfunc.alphaformat = win32.ac_src_alpha;
34 blendfunc.blendflags = 0;
35
36 win32.updatelayeredwindow(handle, screendc, ref toploc, ref bitmapsize, memdc, ref srcloc, 0, ref blendfunc, win32.ulw_alpha);
37 }
38 finally
39 {
40 if (hbitmap != intptr.zero)
41 {
42 win32.selectobject(memdc, oldbits);
43 win32.deleteobject(hbitmap);
44 }
45 win32.releasedc(intptr.zero, screendc);
46 win32.deletedc(memdc);
47 }
48 }
49 #endregion
然后是win32类
1 class win32
2 {
3 [structlayout(layoutkind.sequential)]
4 public struct size
5 {
6 public int32 cx;
7 public int32 cy;
8
9 public size(int32 x, int32 y)
10 {
11 cx = x;
12 cy = y;
13 }
14 }
15
16 [structlayout(layoutkind.sequential, pack = 1)]
17 public struct blendfunction
18 {
19 public byte blendop;
20 public byte blendflags;
21 public byte sourceconstantalpha;
22 public byte alphaformat;
23 }
24
25 [structlayout(layoutkind.sequential)]
26 public struct point
27 {
28 public int32 x;
29 public int32 y;
30
31 public point(int32 x, int32 y)
32 {
33 this.x = x;
34 this.y = y;
35 }
36 }
37
38 public const byte ac_src_over = 0;
39 public const int32 ulw_alpha = 2;
40 public const byte ac_src_alpha = 1;
41
42 [dllimport("gdi32.dll", exactspelling = true, setlasterror = true)]
43 public static extern intptr createcompatibledc(intptr hdc);
44
45 [dllimport("user32.dll", exactspelling = true, setlasterror = true)]
46 public static extern intptr getdc(intptr hwnd);
47
48 [dllimport("gdi32.dll", exactspelling = true)]
49 public static extern intptr selectobject(intptr hdc, intptr hobj);
50
51 [dllimport("user32.dll", exactspelling = true)]
52 public static extern int releasedc(intptr hwnd, intptr hdc);
53
54 [dllimport("gdi32.dll", exactspelling = true, setlasterror = true)]
55 public static extern int deletedc(intptr hdc);
56
57 [dllimport("gdi32.dll", exactspelling = true, setlasterror = true)]
58 public static extern int deleteobject(intptr hobj);
59
60 [dllimport("user32.dll", exactspelling = true, setlasterror = true)]
61 public static extern int updatelayeredwindow(intptr hwnd, intptr hdcdst, ref point pptdst, ref size psize, intptr hdcsrc, ref point pptsrc, int32 crkey, ref blendfunction pblend, int32 dwflags);
62
63 [dllimport("gdi32.dll", exactspelling = true, setlasterror = true)]
64 public static extern intptr extcreateregion(intptr lpxform, uint ncount, intptr rgndata);
65 }
然后就是构造函数了，根据传入参数，画出图片并设置窗体
1 #region 构造函数 english:constructor
2 /// <summary>
3 /// 功能描述:构造函数 english:constructor
4 /// 作 者:hzh
5 /// 创建日期:2019-08-29 15:27:51
6 /// 任务编号:
7 /// </summary>
8 /// <param name="rectcontrol">停靠区域</param>
9 /// <param name="strmsg">消息</param>
10 /// <param name="location">显示方位</param>
11 /// <param name="background">背景色</param>
12 /// <param name="forecolor">文字颜色</param>
13 /// <param name="fontsize">文字大小</param>
14 /// <param name="autoclosetime">自动关闭时间，当<=0时不自动关闭</param>
15 private frmanchortips(
16 rectangle rectcontrol,
17 string strmsg,
18 anchortipslocation location = anchortipslocation.right,
19 color? background = null,
20 color? forecolor = null,
21 int fontsize = 10,
22 int autoclosetime = 5000)
23 {
24 initializecomponent();
25 graphics g = this.creategraphics();
26 font _font = new font("微软雅黑", fontsize);
27 color _background = background == null ? color.fromargb(255, 77, 58) : background.value;
28 color _forecolor = forecolor == null ? color.white : forecolor.value;
29 system.drawing.sizef sizetext = g.measurestring(strmsg, _font);
30 g.dispose();
31 var formsize = new size((int)sizetext.width + 20, (int)sizetext.height + 20);
32 if (formsize.width < 20)
33 formsize.width = 20;
34 if (formsize.height < 20)
35 formsize.height = 20;
36 if (location == anchortipslocation.left || location == anchortipslocation.right)
37 {
38 formsize.width += 20;
39 }
40 else
41 {
42 formsize.height += 20;
43 }
44
45 #region 获取窗体path english:get the form path
46 graphicspath path = new graphicspath();
47 rectangle rect;
48 switch (location)
49 {
50 case anchortipslocation.top:
51 rect = new rectangle(1, 1, formsize.width - 2, formsize.height - 20 - 1);
52 this.location = new point(rectcontrol.x + (rectcontrol.width - rect.width) / 2, rectcontrol.y - rect.height - 20);
53 break;
54 case anchortipslocation.right:
55 rect = new rectangle(20, 1, formsize.width - 20 - 1, formsize.height - 2);
56 this.location = new point(rectcontrol.right, rectcontrol.y + (rectcontrol.height - rect.height) / 2);
57 break;
58 case anchortipslocation.bottom:
59 rect = new rectangle(1, 20, formsize.width - 2, formsize.height - 20 - 1);
60 this.location = new point(rectcontrol.x + (rectcontrol.width - rect.width) / 2, rectcontrol.bottom);
61 break;
62 default:
63 rect = new rectangle(1, 1, formsize.width - 20 - 1, formsize.height - 2);
64 this.location = new point(rectcontrol.x - rect.width - 20, rectcontrol.y + (rectcontrol.height - rect.height) / 2);
65 break;
66 }
67 int cornerradius = 2;
68
69 path.addarc(rect.x, rect.y, cornerradius * 2, cornerradius * 2, 180, 90);//左上角
70 #region 上边
71 if (location == anchortipslocation.bottom)
72 {
73 path.addline(rect.x + cornerradius, rect.y, rect.left + rect.width / 2 - 10, rect.y);//上
74 path.addline(rect.left + rect.width / 2 - 10, rect.y, rect.left + rect.width / 2, rect.y - 19);//上
75 path.addline(rect.left + rect.width / 2, rect.y - 19, rect.left + rect.width / 2 + 10, rect.y);//上
76 path.addline(rect.left + rect.width / 2 + 10, rect.y, rect.right - cornerradius * 2, rect.y);//上
77 }
78 else
79 {
80 path.addline(rect.x + cornerradius, rect.y, rect.right - cornerradius * 2, rect.y);//上
81 }
82 #endregion
83 path.addarc(rect.x + rect.width - cornerradius * 2, rect.y, cornerradius * 2, cornerradius * 2, 270, 90);//右上角
84 #region 右边
85 if (location == anchortipslocation.left)
86 {
87 path.addline(rect.right, rect.y + cornerradius * 2, rect.right, rect.y + rect.height / 2 - 10);//右
88 path.addline(rect.right, rect.y + rect.height / 2 - 10, rect.right + 19, rect.y + rect.height / 2);//右
89 path.addline(rect.right + 19, rect.y + rect.height / 2, rect.right, rect.y + rect.height / 2 + 10);//右
90 path.addline(rect.right, rect.y + rect.height / 2 + 10, rect.right, rect.y + rect.height - cornerradius * 2);//右
91 }
92 else
93 {
94 path.addline(rect.right, rect.y + cornerradius * 2, rect.right, rect.y + rect.height - cornerradius * 2);//右
95 }
96 #endregion
97 path.addarc(rect.x + rect.width - cornerradius * 2, rect.y + rect.height - cornerradius * 2, cornerradius * 2, cornerradius * 2, 0, 90);//右下角
98 #region 下边
99 if (location == anchortipslocation.top)
100 {
101 path.addline(rect.right - cornerradius * 2, rect.bottom, rect.left + rect.width / 2 + 10, rect.bottom);
102 path.addline(rect.left + rect.width / 2 + 10, rect.bottom, rect.left + rect.width / 2, rect.bottom + 19);
103 path.addline(rect.left + rect.width / 2, rect.bottom + 19, rect.left + rect.width / 2 - 10, rect.bottom);
104 path.addline(rect.left + rect.width / 2 - 10, rect.bottom, rect.x + cornerradius * 2, rect.bottom);
105 }
106 else
107 {
108 path.addline(rect.right - cornerradius * 2, rect.bottom, rect.x + cornerradius * 2, rect.bottom);
109 }
110 #endregion
111 path.addarc(rect.x, rect.bottom - cornerradius * 2, cornerradius * 2, cornerradius * 2, 90, 90);//左下角
112 #region 左边
113 if (location == anchortipslocation.right)
114 {
115 path.addline(rect.left, rect.y + cornerradius * 2, rect.left, rect.y + rect.height / 2 - 10);//左
116 path.addline(rect.left, rect.y + rect.height / 2 - 10, rect.left - 19, rect.y + rect.height / 2);//左
117 path.addline(rect.left - 19, rect.y + rect.height / 2, rect.left, rect.y + rect.height / 2 + 10);//左
118 path.addline(rect.left, rect.y + rect.height / 2 + 10, rect.left, rect.y + rect.height - cornerradius * 2);//左
119 }
120 else
121 {
122 path.addline(rect.x, rect.bottom - cornerradius * 2, rect.x, rect.y + cornerradius * 2);//左
123 }
124 #endregion
125 path.closefigure();
126 #endregion
127
128 bitmap bit = new bitmap(formsize.width, formsize.height);
129 this.size = formsize;
130
131 #region 画图 english:drawing
132 graphics gbit = graphics.fromimage(bit);
133 gbit.setgdihigh();
134 gbit.fillpath(new solidbrush(_background), path);
135 gbit.drawstring(strmsg, _font, new solidbrush(_forecolor), rect.location + new size(10, 10));
136 gbit.dispose();
137 #endregion
138
139 setbits(bit);
140 if (autoclosetime > 0)
141 {
142 timer t = new timer();
143 t.interval = autoclosetime;
144 t.tick += (a, b) =>
145 {
146 this.close();
147 };
148 t.enabled = true;
149 }
150 }
151 #endregion
再来2个静态函数以供调用
1 #region 显示一个提示 english:show a hint
2 /// <summary>
3 /// 功能描述:显示一个提示 english:show a hint
4 /// 作 者:hzh
5 /// 创建日期:2019-08-29 15:28:58
6 /// 任务编号:
7 /// </summary>
8 /// <param name="parentcontrol">停靠控件</param>
9 /// <param name="strmsg">消息</param>
10 /// <param name="location">显示方位</param>
11 /// <param name="background">背景色</param>
12 /// <param name="forecolor">文字颜色</param>
13 /// <param name="deviation">偏移量</param>
14 /// <param name="fontsize">文字大小</param>
15 /// <param name="autoclosetime">自动关闭时间，当<=0时不自动关闭</param>
16 public static frmanchortips showtips(
17 control parentcontrol,
18 string strmsg,
19 anchortipslocation location = anchortipslocation.right,
20 color? background = null,
21 color? forecolor = null,
22 size? deviation = null,
23 int fontsize = 10,
24 int autoclosetime = 5000)
25 {
26 point p;
27 if (parentcontrol is form)
28 {
29 p = parentcontrol.location;
30 }
31 else
32 {
33 p = parentcontrol.parent.pointtoscreen(parentcontrol.location);
34 }
35 if (deviation != null)
36 {
37 p = p + deviation.value;
38 }
39 return showtips(parentcontrol.findform(), new rectangle(p, parentcontrol.size), strmsg, location, background, forecolor, fontsize, autoclosetime);
40 }
41 #endregion
42
43 #region 显示一个提示 english:show a hint
44 /// <summary>
45 /// 功能描述:显示一个提示 english:show a hint
46 /// 作 者:hzh
47 /// 创建日期:2019-08-29 15:29:07
48 /// 任务编号:
49 /// </summary>
50 /// <param name="parentform">父窗体</param>
51 /// <param name="rectcontrol">停靠区域</param>
52 /// <param name="strmsg">消息</param>
53 /// <param name="location">显示方位</param>
54 /// <param name="background">背景色</param>
55 /// <param name="forecolor">文字颜色</param>
56 /// <param name="fontsize">文字大小</param>
57 /// <param name="autoclosetime">自动关闭时间，当<=0时不自动关闭</param>
58 /// <returns>返回值</returns>
59 public static frmanchortips showtips(
60 form parentform,
61 rectangle rectcontrol,
62 string strmsg,
63 anchortipslocation location = anchortipslocation.right,
64 color? background = null,
65 color? forecolor = null,
66 int fontsize = 10,
67 int autoclosetime = 5000)
68 {
69 frmanchortips frm = new frmanchortips(rectcontrol, strmsg, location, background, forecolor, fontsize, autoclosetime);
70 frm.topmost = true;
71 frm.show(parentform);
72 return frm;
73 }
74 #endregion
全部代码
1 using system;
2 using system.collections.generic;
3 using system.componentmodel;
4 using system.data;
5 using system.drawing;
6 using system.drawing.drawing2d;
7 using system.linq;
8 using system.runtime.interopservices;
9 using system.text;
10 using system.windows.forms;
11
12 namespace hzh_controls.forms
13 {
14 public partial class frmanchortips : form
15 {
16 bool havehandle = false;
17 #region 构造函数 english:constructor
18 /// <summary>
19 /// 功能描述:构造函数 english:constructor
20 /// 作 者:hzh
21 /// 创建日期:2019-08-29 15:27:51
22 /// 任务编号:
23 /// </summary>
24 /// <param name="rectcontrol">停靠区域</param>
25 /// <param name="strmsg">消息</param>
26 /// <param name="location">显示方位</param>
27 /// <param name="background">背景色</param>
28 /// <param name="forecolor">文字颜色</param>
29 /// <param name="fontsize">文字大小</param>
30 /// <param name="autoclosetime">自动关闭时间，当<=0时不自动关闭</param>
31 private frmanchortips(
32 rectangle rectcontrol,
33 string strmsg,
34 anchortipslocation location = anchortipslocation.right,
35 color? background = null,
36 color? forecolor = null,
37 int fontsize = 10,
38 int autoclosetime = 5000)
39 {
40 initializecomponent();
41 graphics g = this.creategraphics();
42 font _font = new font("微软雅黑", fontsize);
43 color _background = background == null ? color.fromargb(255, 77, 58) : background.value;
44 color _forecolor = forecolor == null ? color.white : forecolor.value;
45 system.drawing.sizef sizetext = g.measurestring(strmsg, _font);
46 g.dispose();
47 var formsize = new size((int)sizetext.width + 20, (int)sizetext.height + 20);
48 if (formsize.width < 20)
49 formsize.width = 20;
50 if (formsize.height < 20)
51 formsize.height = 20;
52 if (location == anchortipslocation.left || location == anchortipslocation.right)
53 {
54 formsize.width += 20;
55 }
56 else
57 {
58 formsize.height += 20;
59 }
60
61 #region 获取窗体path english:get the form path
62 graphicspath path = new graphicspath();
63 rectangle rect;
64 switch (location)
65 {
66 case anchortipslocation.top:
67 rect = new rectangle(1, 1, formsize.width - 2, formsize.height - 20 - 1);
68 this.location = new point(rectcontrol.x + (rectcontrol.width - rect.width) / 2, rectcontrol.y - rect.height - 20);
69 break;
70 case anchortipslocation.right:
71 rect = new rectangle(20, 1, formsize.width - 20 - 1, formsize.height - 2);
72 this.location = new point(rectcontrol.right, rectcontrol.y + (rectcontrol.height - rect.height) / 2);
73 break;
74 case anchortipslocation.bottom:
75 rect = new rectangle(1, 20, formsize.width - 2, formsize.height - 20 - 1);
76 this.location = new point(rectcontrol.x + (rectcontrol.width - rect.width) / 2, rectcontrol.bottom);
77 break;
78 default:
79 rect = new rectangle(1, 1, formsize.width - 20 - 1, formsize.height - 2);
80 this.location = new point(rectcontrol.x - rect.width - 20, rectcontrol.y + (rectcontrol.height - rect.height) / 2);
81 break;
82 }
83 int cornerradius = 2;
84
85 path.addarc(rect.x, rect.y, cornerradius * 2, cornerradius * 2, 180, 90);//左上角
86 #region 上边
87 if (location == anchortipslocation.bottom)
88 {
89 path.addline(rect.x + cornerradius, rect.y, rect.left + rect.width / 2 - 10, rect.y);//上
90 path.addline(rect.left + rect.width / 2 - 10, rect.y, rect.left + rect.width / 2, rect.y - 19);//上
91 path.addline(rect.left + rect.width / 2, rect.y - 19, rect.left + rect.width / 2 + 10, rect.y);//上
92 path.addline(rect.left + rect.width / 2 + 10, rect.y, rect.right - cornerradius * 2, rect.y);//上
93 }
94 else
95 {
96 path.addline(rect.x + cornerradius, rect.y, rect.right - cornerradius * 2, rect.y);//上
97 }
98 #endregion
99 path.addarc(rect.x + rect.width - cornerradius * 2, rect.y, cornerradius * 2, cornerradius * 2, 270, 90);//右上角
100 #region 右边
101 if (location == anchortipslocation.left)
102 {
103 path.addline(rect.right, rect.y + cornerradius * 2, rect.right, rect.y + rect.height / 2 - 10);//右
104 path.addline(rect.right, rect.y + rect.height / 2 - 10, rect.right + 19, rect.y + rect.height / 2);//右
105 path.addline(rect.right + 19, rect.y + rect.height / 2, rect.right, rect.y + rect.height / 2 + 10);//右
106 path.addline(rect.right, rect.y + rect.height / 2 + 10, rect.right, rect.y + rect.height - cornerradius * 2);//右
107 }
108 else
109 {
110 path.addline(rect.right, rect.y + cornerradius * 2, rect.right, rect.y + rect.height - cornerradius * 2);//右
111 }
112 #endregion
113 path.addarc(rect.x + rect.width - cornerradius * 2, rect.y + rect.height - cornerradius * 2, cornerradius * 2, cornerradius * 2, 0, 90);//右下角
114 #region 下边
115 if (location == anchortipslocation.top)
116 {
117 path.addline(rect.right - cornerradius * 2, rect.bottom, rect.left + rect.width / 2 + 10, rect.bottom);
118 path.addline(rect.left + rect.width / 2 + 10, rect.bottom, rect.left + rect.width / 2, rect.bottom + 19);
119 path.addline(rect.left + rect.width / 2, rect.bottom + 19, rect.left + rect.width / 2 - 10, rect.bottom);
120 path.addline(rect.left + rect.width / 2 - 10, rect.bottom, rect.x + cornerradius * 2, rect.bottom);
121 }
122 else
123 {
124 path.addline(rect.right - cornerradius * 2, rect.bottom, rect.x + cornerradius * 2, rect.bottom);
125 }
126 #endregion
127 path.addarc(rect.x, rect.bottom - cornerradius * 2, cornerradius * 2, cornerradius * 2, 90, 90);//左下角
128 #region 左边
129 if (location == anchortipslocation.right)
130 {
131 path.addline(rect.left, rect.y + cornerradius * 2, rect.left, rect.y + rect.height / 2 - 10);//左
132 path.addline(rect.left, rect.y + rect.height / 2 - 10, rect.left - 19, rect.y + rect.height / 2);//左
133 path.addline(rect.left - 19, rect.y + rect.height / 2, rect.left, rect.y + rect.height / 2 + 10);//左
134 path.addline(rect.left, rect.y + rect.height / 2 + 10, rect.left, rect.y + rect.height - cornerradius * 2);//左
135 }
136 else
137 {
138 path.addline(rect.x, rect.bottom - cornerradius * 2, rect.x, rect.y + cornerradius * 2);//左
139 }
140 #endregion
141 path.closefigure();
142 #endregion
143
144 bitmap bit = new bitmap(formsize.width, formsize.height);
145 this.size = formsize;
146
147 #region 画图 english:drawing
148 graphics gbit = graphics.fromimage(bit);
149 gbit.setgdihigh();
150 gbit.fillpath(new solidbrush(_background), path);
151 gbit.drawstring(strmsg, _font, new solidbrush(_forecolor), rect.location + new size(10, 10));
152 gbit.dispose();
153 #endregion
154
155 setbits(bit);
156 if (autoclosetime > 0)
157 {
158 timer t = new timer();
159 t.interval = autoclosetime;
160 t.tick += (a, b) =>
161 {
162 this.close();
163 };
164 t.enabled = true;
165 }
166 }
167 #endregion
168
169 #region 显示一个提示 english:show a hint
170 /// <summary>
171 /// 功能描述:显示一个提示 english:show a hint
172 /// 作 者:hzh
173 /// 创建日期:2019-08-29 15:28:58
174 /// 任务编号:
175 /// </summary>
176 /// <param name="parentcontrol">停靠控件</param>
177 /// <param name="strmsg">消息</param>
178 /// <param name="location">显示方位</param>
179 /// <param name="background">背景色</param>
180 /// <param name="forecolor">文字颜色</param>
181 /// <param name="deviation">偏移量</param>
182 /// <param name="fontsize">文字大小</param>
183 /// <param name="autoclosetime">自动关闭时间，当<=0时不自动关闭</param>
184 public static frmanchortips showtips(
185 control parentcontrol,
186 string strmsg,
187 anchortipslocation location = anchortipslocation.right,
188 color? background = null,
189 color? forecolor = null,
190 size? deviation = null,
191 int fontsize = 10,
192 int autoclosetime = 5000)
193 {
194 point p;
195 if (parentcontrol is form)
196 {
197 p = parentcontrol.location;
198 }
199 else
200 {
201 p = parentcontrol.parent.pointtoscreen(parentcontrol.location);
202 }
203 if (deviation != null)
204 {
205 p = p + deviation.value;
206 }
207 return showtips(parentcontrol.findform(), new rectangle(p, parentcontrol.size), strmsg, location, background, forecolor, fontsize, autoclosetime);
208 }
209 #endregion
210
211 #region 显示一个提示 english:show a hint
212 /// <summary>
213 /// 功能描述:显示一个提示 english:show a hint
214 /// 作 者:hzh
215 /// 创建日期:2019-08-29 15:29:07
216 /// 任务编号:
217 /// </summary>
218 /// <param name="parentform">父窗体</param>
219 /// <param name="rectcontrol">停靠区域</param>
220 /// <param name="strmsg">消息</param>
221 /// <param name="location">显示方位</param>
222 /// <param name="background">背景色</param>
223 /// <param name="forecolor">文字颜色</param>
224 /// <param name="fontsize">文字大小</param>
225 /// <param name="autoclosetime">自动关闭时间，当<=0时不自动关闭</param>
226 /// <returns>返回值</returns>
227 public static frmanchortips showtips(
228 form parentform,
229 rectangle rectcontrol,
230 string strmsg,
231 anchortipslocation location = anchortipslocation.right,
232 color? background = null,
233 color? forecolor = null,
234 int fontsize = 10,
235 int autoclosetime = 5000)
236 {
237 frmanchortips frm = new frmanchortips(rectcontrol, strmsg, location, background, forecolor, fontsize, autoclosetime);
238 frm.topmost = true;
239 frm.show(parentform);
240 return frm;
241 }
242 #endregion
243
244 #region override
245
246 protected override void onclosing(canceleventargs e)
247 {
248 e.cancel = true;
249 base.onclosing(e);
250 havehandle = false;
251 this.dispose();
252 }
253
254 protected override void onhandlecreated(eventargs e)
255 {
256 initializestyles();
257 base.onhandlecreated(e);
258 havehandle = true;
259 }
260
261 protected override createparams createparams
262 {
263 get
264 {
265 createparams cparms = base.createparams;
266 cparms.exstyle |= 0x00080000; // ws_ex_layered
267 return cparms;
268 }
269 }
270
271 #endregion
272
273 private void initializestyles()
274 {
275 setstyle(controlstyles.allpaintinginwmpaint, true);
276 setstyle(controlstyles.userpaint, true);
277 updatestyles();
278 }
279
280 #region 根据图片显示窗体 english:display forms based on pictures
281 /// <summary>
282 /// 功能描述:根据图片显示窗体 english:display forms based on pictures
283 /// 作 者:hzh
284 /// 创建日期:2019-08-29 15:31:16
285 /// 任务编号:
286 /// </summary>
287 /// <param name="bitmap">bitmap</param>
288 private void setbits(bitmap bitmap)
289 {
290 if (!havehandle) return;
291
292 if (!bitmap.iscanonicalpixelformat(bitmap.pixelformat) || !bitmap.isalphapixelformat(bitmap.pixelformat))
293 throw new applicationexception("the picture must be 32bit picture with alpha channel.");
294
295 intptr oldbits = intptr.zero;
296 intptr screendc = win32.getdc(intptr.zero);
297 intptr hbitmap = intptr.zero;
298 intptr memdc = win32.createcompatibledc(screendc);
299
300 try
301 {
302 win32.point toploc = new win32.point(left, top);
303 win32.size bitmapsize = new win32.size(bitmap.width, bitmap.height);
304 win32.blendfunction blendfunc = new win32.blendfunction();
305 win32.point srcloc = new win32.point(0, 0);
306
307 hbitmap = bitmap.gethbitmap(color.fromargb(0));
308 oldbits = win32.selectobject(memdc, hbitmap);
309
310 blendfunc.blendop = win32.ac_src_over;
311 blendfunc.sourceconstantalpha = 255;
312 blendfunc.alphaformat = win32.ac_src_alpha;
313 blendfunc.blendflags = 0;
314
315 win32.updatelayeredwindow(handle, screendc, ref toploc, ref bitmapsize, memdc, ref srcloc, 0, ref blendfunc, win32.ulw_alpha);
316 }
317 finally
318 {
319 if (hbitmap != intptr.zero)
320 {
321 win32.selectobject(memdc, oldbits);
322 win32.deleteobject(hbitmap);
323 }
324 win32.releasedc(intptr.zero, screendc);
325 win32.deletedc(memdc);
326 }
327 }
328 #endregion
329 }
330
331 public enum anchortipslocation
332 {
333 left,
334 top,
335 right,
336 bottom
337 }
338
339 class win32
340 {
341 [structlayout(layoutkind.sequential)]
342 public struct size
343 {
344 public int32 cx;
345 public int32 cy;
346
347 public size(int32 x, int32 y)
348 {
349 cx = x;
350 cy = y;
351 }
352 }
353
354 [structlayout(layoutkind.sequential, pack = 1)]
355 public struct blendfunction
356 {
357 public byte blendop;
358 public byte blendflags;
359 public byte sourceconstantalpha;
360 public byte alphaformat;
361 }
362
363 [structlayout(layoutkind.sequential)]
364 public struct point
365 {
366 public int32 x;
367 public int32 y;
368
369 public point(int32 x, int32 y)
370 {
371 this.x = x;
372 this.y = y;
373 }
374 }
375
376 public const byte ac_src_over = 0;
377 public const int32 ulw_alpha = 2;
378 public const byte ac_src_alpha = 1;
379
380 [dllimport("gdi32.dll", exactspelling = true, setlasterror = true)]
381 public static extern intptr createcompatibledc(intptr hdc);
382
383 [dllimport("user32.dll", exactspelling = true, setlasterror = true)]
384 public static extern intptr getdc(intptr hwnd);
385
386 [dllimport("gdi32.dll", exactspelling = true)]
387 public static extern intptr selectobject(intptr hdc, intptr hobj);
388
389 [dllimport("user32.dll", exactspelling = true)]
390 public static extern int releasedc(intptr hwnd, intptr hdc);
391
392 [dllimport("gdi32.dll", exactspelling = true, setlasterror = true)]
393 public static extern int deletedc(intptr hdc);
394
395 [dllimport("gdi32.dll", exactspelling = true, setlasterror = true)]
396 public static extern int deleteobject(intptr hobj);
397
398 [dllimport("user32.dll", exactspelling = true, setlasterror = true)]
399 public static extern int updatelayeredwindow(intptr hwnd, intptr hdcdst, ref point pptdst, ref size psize, intptr hdcsrc, ref point pptsrc, int32 crkey, ref blendfunction pblend, int32 dwflags);
400
401 [dllimport("gdi32.dll", exactspelling = true, setlasterror = true)]
402 public static extern intptr extcreateregion(intptr lpxform, uint ncount, intptr rgndata);
403 }
404 }
1 namespace hzh_controls.forms
2 {
3 partial class frmanchortips
4 {
5 /// <summary>
6 /// required designer variable.
7 /// </summary>
8 private system.componentmodel.icontainer components = null;
9
10 /// <summary>
11 /// clean up any resources being used.
12 /// </summary>
13 /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
14 protected override void dispose(bool disposing)
15 {
16 if (disposing && (components != null))
17 {
18 components.dispose();
19 }
20 base.dispose(disposing);
21 }
22
23 #region windows form designer generated code
24
25 /// <summary>
26 /// required method for designer support - do not modify
27 /// the contents of this method with the code editor.
28 /// </summary>
29 private void initializecomponent()
30 {
31 this.suspendlayout();
32 //
33 // frmanchortips
34 //
35 this.autoscaledimensions = new system.drawing.sizef(6f, 12f);
36 this.autoscalemode = system.windows.forms.autoscalemode.font;
37 this.clientsize = new system.drawing.size(226, 83);
38 this.formborderstyle = system.windows.forms.formborderstyle.none;
39 this.name = "frmanchortips";
40 this.startposition = system.windows.forms.formstartposition.manual;
41 this.text = "frmanchortips";
42 this.resumelayout(false);
43
44 }
45
46 #endregion
47 }
48 }
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